We describe a new active queue management scheme, Random Exponential Marking (REM), that aims to achieve both high utilization and negligible loss and delay in a simple and scalable manner. The key idea is to decouple congestion measure from performance measure such as loss, queue length or delay. While congestion measure indicates excess demand for bandwidth and must track the number of users,...

In this paper, we consider a nonblocking ATM switch with capacity C which adopts a hybrid priority control scheme in input buffers. Each input queue has two separate buffer spaces with different sizes for two classes of traffics, and adopts a general state-dependent scheduling scheme which assigns priorities to each class dynamically. We obtain the distribution of input queue length, loss proba...

Experimental results with standard ON-OFF sources, as input to a one server queue, indicate that the M/D/1 model is adequate below a certain utilization, ρ* (say), and plain wrong above. Moreover, as the output capacity increases, ρ* increases towards 1. We provide simple engineering formulae, together with computable conditions of their applicability, to physically explain these facts. We also...

This study investigates the statistical process control application for monitoring queue length data in M/G/1 systems. Specifically, we studied the average run length (ARL) characteristics of two different control charts for detecting changes in system utilization. First, the nL chart monitors the sums of successive queue length samples by subgrouping individual observations with sample size n....

This paper presents a new mathematical model to solve cell formation problem in cellular manufacturing systems, where inter-arrival time, processing time, and machine breakdown time are probabilistic. The objective function maximizes the number of operations of each part with more arrival rate within one cell. Because a queue behind each machine; queuing theory is used to formulate the model. T...

In this paper, we present the results of a study priority multi-server queuing system with heterogeneous customers arriving according to marked Markovian arrival process (MMAP), phase-type service times (PH), and queue finite capacity. Priority traffic classes differ in PH distributions time probability joining queue, which depends on current length queue. If is full, customer does not enter sy...

The present investigation presents a stochastic model for a flexible manufacturing system consisting of flexible machine, loading/unloading robot and an automated pallethandling device. We consider unreliable flexible manufacturing cell (FMC) wherein machine and robot operate under individual as well as common cause random failures. The pallethandling system is completely reliable. The pallet o...

Cognitive radio networks (CRNs) let unlicensed or secondary users (SUs) access licensed spectra, improving wireless resource utilization and addressing the problem of spectrum shortage. SUs are allowed spectrum access only when they don’t cause unacceptable levels of interference to licensed or primary users (PUs). Although throughput-optimal algorithms based on the well-known maximal-weight sc...

Treatment duration is one of the most important factors that patients consider when deciding whether to undergo orthodontic treatment or not. This study aimed build and compare machine learning (ML) models for prediction length identify affecting using ML approach. Records 518 who had successfully finished were used in this study. Seventy percent patient data training models, thirty testing the...

Active queue management policies and in particular Random Early Detection RED are being advocated by the Internet Engineering Task Force IETF as additional mechanisms in Internet routers to control congestion and keep network utilization high RED s performance is highly dependent on the settings of its ve control parameters However no rm guidelines exist on con guring RED parameters and the cur...